SLUUCZ0 April   2024 TPS562243 , TPS562246

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 Input and Output Connections
    2. 2.2 Output Voltage Setpoint
    3. 2.3 Start-Up Procedure
  8. 3Implementation Results
    1. 3.1 Test Setup and Results
      1. 3.1.1 Load Transient Response
      2. 3.1.2 Start-Up
      3. 3.1.3 Shutdown
      4. 3.1.4 Output Voltage Ripple
  9. 4Hardware Design Files
    1. 4.1 Schematic
    2. 4.2 PCB Layout
    3. 4.3 Bill of Materials
  10. 5Additional Information
    1. 5.1 Trademarks
  11. 6Reference

2.2 Output Voltage Setpoint

The output voltage of the TPS56224xEVM can be selected by changing the value of resistor R4 (RFBT) and R5 (RFBB). TI recommends using 1% tolerance or better divider resistors. Start with a 10kΩ for R5 (RFBB) and use Equation 1 to calculate R4 (RFBT). To improve efficiency at light loads, consider using larger value resistors. If the values are too high, then the regulator is more susceptible to noise and voltage errors from the FB input current are noticeable.

Equation 1. R 4   =   R 5   ×   V o u t   -   0 . 6   V 0 . 6   V